MK3 GTI 16v - tuning options and expected BHP?

[general_piffle]

OK so I've been comparing notes with Graham at Penguin Motors and have decided to go with:

- Sports cat and stainless 4 branch manifold to add to the current cat back resonated Jetex system
- Pipercross Viper cold air induction kit
- Newman cam (with all associated parts, guides, springs, vernier, etc.)
- Polished and ported head

I already have an uprated chip fitted so it'll be interesting to see what difference the above makes. Then if later on down the line I decide to fit throttle bodies, new ECU, uprated injectors, etc. I have the right base in place to get the most out of those upgrades.

[Foreveryoungaus16v]

4 branch sports cat won't give you any more power. Standard branch flows perfectly well. Why did you get a resonated exhaust as that will hold a tiny bit back. Just de cat it. Read posts by Ess_three and things will become more clear. Otherwise you will be wasting money for not a lot of gain.

[general_piffle]

4 branch sports cat won't give you any more power. Standard branch flows perfectly well. Why did you get a resonated exhaust as that will hold a tiny bit back. Just de cat it. Read posts by Ess_three and things will become more clear. Otherwise you will be wasting money for not a lot of gain.

Went for resonated and keeping the cat but changing it to a sports cat simply to pass MOTs without too much fuss and also so there's not too much noise in the cabin. From having driven de-catted cars before, any distance and the exhaust drone is just annoying.